[bug]: user should not be allowed to create folders with same name inside a single collection

[Nick-h4ck3r]

Describe the bug
Currently, users can create folders with the same name inside a single collection. This should not be the ideal scenario.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Collection Explorer'
2. Create a collection with the name 'anyname'.
3. Create a folder inside it as 'test'.
4. Create another folder inside 'anyname' collection as 'test'.

Expected behavior

Creating a file/folder with the same name, inside the same parent directory should be disabled. The user should get a prompt with a similar error as follows.

Image screenshot from vscode

Screenshots

Current scenario in firecamp

Desktop (please complete the following information):

• OS: All
• Browser: All
• Version: All

[Nick-h4ck3r]

I would like to work on this issue, @Nishchit14 assign me this one.

[Nishchit14]

Thank you for bringing the PR quickly @Nick-h4ck3r